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sagemath · Jun 10, 2020 · 7b70830 · 7b70830
1 parent 05eba1e
commit 7b70830
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Showing 4 changed files with 6 additions and 4 deletions.
diff --git a/src/sage/matrix/matrix_integer_dense.pxd b/src/sage/matrix/matrix_integer_dense.pxd
@@ -22,6 +22,7 @@ cdef class Matrix_integer_dense(Matrix_dense):
     cdef inline void get_unsafe_mpz(self, Py_ssize_t i, Py_ssize_t j, mpz_t value)
     cdef inline double get_unsafe_double(self, Py_ssize_t i, Py_ssize_t j)
     cdef bint get_is_zero_unsafe(self, Py_ssize_t, Py_ssize_t)
+    cpdef zero_pattern_matrix(self)
 
     # HNF Modn
     cdef int _hnf_modn(Matrix_integer_dense self, Matrix_integer_dense res,

diff --git a/src/sage/matrix/matrix_integer_dense.pyx b/src/sage/matrix/matrix_integer_dense.pyx
@@ -1567,14 +1567,14 @@ cdef class Matrix_integer_dense(Matrix_dense):
         MS = matrix_space.MatrixSpace(GF(2), self._nrows, self._ncols)
         return Matrix_mod2_dense(MS, self, True, True)
 
-    def _zero_matrix(self):
+    cpdef zero_pattern_matrix(self):
         """
         Return a matrix that contains 1 if and only if the corresponding entry is 0.
 
         EXAMPLES::
 
             sage: M = Matrix(ZZ, 2, [1,2,-2,0])
-            sage: M._zero_matrix()
+            sage: M.zero_pattern_matrix()
             [0 0]
             [0 1]
         """

diff --git a/src/sage/matrix/matrix_rational_dense.pxd b/src/sage/matrix/matrix_rational_dense.pxd
@@ -16,6 +16,7 @@ cdef class Matrix_rational_dense(Matrix_dense):
     cdef _sub_ui_unsafe_assuming_int(self, Py_ssize_t i, Py_ssize_t j, unsigned long int n)
 
     cdef bint get_is_zero_unsafe(self, Py_ssize_t, Py_ssize_t)
+    cpdef zero_pattern_matrix(self)
 
     cdef inline Matrix_rational_dense _new_matrix(self, Py_ssize_t nrows, Py_ssize_t ncols)
 

diff --git a/src/sage/matrix/matrix_rational_dense.pyx b/src/sage/matrix/matrix_rational_dense.pyx
@@ -1426,14 +1426,14 @@ cdef class Matrix_rational_dense(Matrix_dense):
         verbose("done computing right kernel matrix over the rationals for %sx%s matrix" % (self.nrows(), self.ncols()),level=1, t=tm)
         return 'computed-iml-rational', K
 
-    def _zero_matrix(self):
+    cpdef zero_pattern_matrix(self):
         """
         Return a matrix that contains 1 if and only if the corresponding entry is 0.
 
         EXAMPLES::
 
             sage: M = Matrix(QQ, 2, [1,2/3,-2,0])
-            sage: M._zero_matrix()
+            sage: M.zero_pattern_matrix()
             [0 0]
             [0 1]
         """